Bell hoist



June 24, 1930. HANDY 1,768,054

BELL HOIST 7 Filed Jan. 26, 1928 2 Sheets-Sheet 1 W 5. Ha !NVENTOR ATTORNEY June 24, 1930. A. E. HANDY 1,768,054

' BELL HOIST Filed Jan- 26, 1928 2 Sheets-Sheet 2 m H7? INVENTORATTORNEY- Patented June 24 1930 r U TEDLSTATES" ARTHU R E. HANDY,

meme "amen. 1

- onLYNBnooK, NEW YORK, .ASSIGNOR TO orrs ELEVATOR GOM- PANY, or newYORK, n. Y., noonronarron on new mnsnv BELL 'nors'r Application filed.January 26;

10 nace air-tight. It is possible'toplace the charge within the furnaceand at the same time keep the furnaceair-tight by providing a receivingcompartment upon the top of the furnace. The upper portion of thecompartment is provided with an opening for receiving the charge andthelower portion of the compartment is provided with a largerv openingleading to the furnace through which the charge may pass. The upperopening is normally closed by a small charging bell and the loweropening is normally'closed by a large charging bell. A hopper leading tothe small bellis usually placed upon the compartment. WVhen it isdesired'to charge the furnace, portions of ore, coke-or coal, and limeare successively carried to the hopper by means of a skip or hoist andadmitted to the compartment through the upper ,opening by moving thesmall bell to its open position, the small bell being closed after eachportion has been dumped into the compartment; the large bell is closedduring the charging of the compartment. -When "the proper mixture hasbeen formed within the compartment the large bell ismoved to its openposition, thereby allowing the entire mixure to be dumped into thefurnace, the small bell remainingclosed during this oper ation.

It is desirable that a machine be employed for operating the bells thatwill permit any desired cycle of operation, since it is often necessaryto vary the number of times the small bell is operated for one operationof the large bell. It is further desirable that the bells be graduallyandrapidly moved to and from their seats. One feature of the-inventionisthe provision of hoisting mechanism employingv a vision of bell hoistingmechanism wherein each bell is gradually accelerated from its I bell israpidly moved toward its closedposiapparent from the followingdescription '1a2s.- Serial Nbt24ae07.

single operating motor for operating both the large bell and the smallbell.

A, second feature of the invention is the provision of a rotaryoperating member for each bell, the operating-member of a bell uponbeing rotated from a neutral position causing its bell to open and uponbeing returned to the'neutral position allowing its bell to close.

A third feature of the invention is the provision of a rotary drivingmember, operated by the motor, for causing the operating members torotate, the driving member by rotation in one direction causing one ofthe operating members to open its bell, and by rotation in the otherdirection causing the other "of the operating members to open its bell;

A fourth feature of the invention is the provision 'of hoistingmechanismwherein gradual acceleration of thefload is secured by means ofcrank action and wherein thereafter a substantiallyconstant speed of theload is secured by means of drum action.

A fifth feature of the invention is the proclosed position by means ofcrank action and p thereafter rapidly moved to its open position bymeans of a drum action, and wherein each tion by means of a drum actionand thereafter retarded in its final closing movement by means of acrankaction.

A sixth feature of the invention is the provision of a bell hoistingmechanism in which the hoisting machine and motor are of a minimum sizefor a given installation.

'A seventh feature of tlieinven tion is the provision of a bell hoistingmechanism in which the bells are positively moved to their 7 openposition. i

Other features and advantages will become and appended claims.

Inthe draw1ngs: Figure 1 1s a schematic representation of the upperportion of a blast furnace illustrating the adaptation ofthe bellhoisting mechanism to the charging, mechanism and showme ing the smallbell in its open position and the large bell in its closed position;

Figure 2 is a plan of the bell hoisting machine with portions brokenaway to illustrate certain structural details; i

Fi ure 3 is anelevationof therbell hoistn D I I e I 1 mg machine with aportion shown n section,

taken along the line 33 of Figure 2, and

,with portionsbroken away to illustrate certain structural details;

1 F igurez5 is a view in section taken along.

the line 5- 5 of Figure. 4'.

Referring to Figure 1, a blast furnace provided-with a compartment 12 atits upper end for receiving a charge of ore, coke or coal,

andlime, or.other material.' -Mounted upon 1 the-upper.. portion .01compartment, 12 is a hopperq13: extending into the Compartment. Thelower end of compartment 12 is normal-- ly closed by a large bell 15andthe upper end of compartment 12, leading. into hopper 13, is i normallyclosed by a small bell 14. Small bell l4 isconnected, by means of ahollow rod 16 to one end of alever orwalking beam 17, the

,leverl'i being .pivotally supported by a fulcru-m. .18. Lever 17Carries at its opposite end a counterweight 2 1 of sufiicient mass tocounterbalance the.weight ofbell14and rod 16. gplus the weight of theload otniaterial 35 (not shown) resting thereon, and to provide in ad-.dition a sufficient forceftov maintaina heavy I sealingpressure betweenbell 14 and its seat.

Large bell 15 is connected-by means of a rod 22 to a lever 23, the lever23 beingpivot ally supported-byai'ulcrum 19. Rod 22 eX- 23 is likewiseprovided with a counterweight,

designated by the numeral 24, counterweight,

24 counterbalancing the weight of bell 15 and rod 22 as well as thecharge and providing sufiicient sealing pressure between bell '15 andits seat.

A hoisting machine 25 is provided for operating small bell 14 and largebell 15. Drums 26 and 27 are loosely mounted upon a shaft 28, bearings31 being provided for shaft 28.

Bearings 31 are supported by a machine base.

32. A hoisting cable 39 for small bell'14 has a section of chain 33 atits lower end secured to drum 26 by means' of a pin 34, cable 39 passingover stationary pulleys 35 and 36 and being connected to lever 17 at itsweighted end. a A hoisting cable for large bell 15 has a section ofchain 37 at its lower end secured to drum 27 by means 01 a'pin '38,cable 40 passing over stationary pulleys 41 and 42 and being connectedto lever 23 at its .weighted end, Thus, rotation of drum 26 from itsneutral position, shown in Figures 2 and 3, causes cable 39 to movetheweighted end of lever Lever 17 upwardly thereby opening-small bell14,1

-.cent er of driving gear 43 adjacent drum'27' is a lug 45. An abutment46 is mounted upon d; .m 26. in the-path of movement of lug 44 and anabutment 47 is mounted upon drum 27 ii epath of movement of lug 45. Whendriving gear- 43- is 'rot'ated from its neutral position in acounter-clockwise direction, as viewedin Figures-1 and 3, its lug 44moves to the I-l'ei't, as viewed in- Figures-2 and 4, and .ges abutment46' of drum' 26, causing l e-drumto rotate witli the gear-thereby openeismallbell 14; as driving gear 43 so moves, lug moves away I fromabutment-47 of therebyopeninglargebell15 as. driving gear t 4650i, drum26, drumutralyposition.

. motor; 48 anounted I "1x12 ,ene,direction or they other. A reversingswitch;4,,is indicated for energizing the armature of the motor to causeit to rotate in tlie' desired direction. 11 gear train 51 em ployed; totra-nsmit motion from..motor 48 anon 26 remaining in 7' forcausinggear',43 to rotate upon rotation of shaft A guard59 is provided forcovering drivinggear43and pinion 58, a cas- 61 bein provided foreuternalgear 54.

A brake is provided for bringing the rot tingzmembers rapidly to restwhen the motorisIdeenergized. The brake is shown asspfiing applied andelectrica ly released, I

In operation, when a load of coke, or ore,

or other materiah has been dumped into hop- I per 13 audit is desired.to dump the load into compartment12, motor 48 1s energized to causedriving gear 43' to rotate from its neutral, position in acounter-clockwise 'direc-' "171011, 315 viewedin Figures 1 and 3,whereby lug 44 engages abutment'46'on drum 26 cans 27,'- drum 27remaining in its neutral ieov s,=its-iug 44 moves away from abutuponbase32 is pro d for causing driving gear 43 to. rotate in to driving,gear.43. Connected to motor shaft drum 26, extends in a directionradiali to neutral position.

the axis'of the drum. As drum 26 rotates, .pin 34 to which chain 33 isattached moves in a circular'arc to gradually open small bell 14, andwhen drumx26 is :rotated approximately 90 degrees, chain .33 becomestangential to the surface of the drum and thereafter chain 33 is woundupon the drum to rapidly move bell 14 to its full openposition, bell 14being fully open when drum 26 has rotated approximately three-quartersof a revolution. The material is then dumped into compartment, 12. Thesmall bell is then in ,theposition shown in Figure Motor 48, is thendeenergized, and brakeGO is ,ap-

plied tobring the moving parts to rest.

In closing bell 14, the reverse operation takes place, motor 48 beingreversed to allow drum '26 to rotate in the opposite direction under theinfluenceof weight 21. WVhen small bell 14 is closed, motor 48 isdeenergized and brake is. applied to bring the moving parts to rest. Theabove operation maybe repeated as often as desired until the properquantity of material has been dumped into compartment 12. When itisdesired to dump the mixture into furnace 11, motor 48 is-energized tocause driving gear 43 t0 rotate from its neutral position in a clockwisedirection, as viewed in Figures 1 and 3, whereby lug 45 engages abutment47 on drum 27 causing thedrum to rotate from its Chain .37 in theneutralposition of drum 27 extends in a direction radial tothe axis of, thedrum. ,As drum 27 rotates, pin 88 to which chain 37 is attached moves ina circular arc to gradually open large bell 15, and when drum 27 isrotated approximately 90 degrees,, chain 37 becomes tangential to thesurface of the drum and thereafter chain 37 is wound upon the drum torapidly move bell15 to its full open position,

bell' lo being fully open when drum 27 has rotated approximatelythree-quarters of a revolution. The material is then dumped into furnace11. When bell 15 is fully opened, motor 48 is deenergized and brake '60is applied to bring the moving parts to rest.

[Motor 48 is then reversed allowing. large bell15 to closeunder theinfluence of weight 24,' chain 87. firstunwinding and then graduallyassuming a radial direction.

It is occasionally necessary to. open both bells to allow the furnace tobreathe- This tral position, the machine operates with a tion.

operates with a drum action and the hoisting cable travels at thesameispeed as the surface of the drum. In closing movement-the operationis reversed, that is, the cable travels at full speed until the drum iswithin onequarter of a revolution from the neutral position. At thispoint, the drum action ceases. and the crank action comes into effect,thereby slowing down the speed of the bell to the closing and sealingpoint. This arrangement permits the use of a motor of minimum horsepower and a machine of minimum proportions.

It is pointed out that it is impossible to open both of the bells at thesametime. Rotation of the driving gear in one direction from, neutralposition can only operate a single bell, the other bell being heldtightly against its seat by its counterweight. Rotation of the drivinggear-in the'other direction from its neutralposition can only operatethe other bell. it is impossible therefore for furnace leaka e to occur;

It is also pointed out that the bell hoisting machine is extremelyflexible in operation. Any cycle of operation may be-jhad since thesmall bell may be repeatedly oper ated without the large bell beingmoved from its closed position, or the large bell may. be

repeatedly operated, if desired, without the small bell being moved fromits closed posilt is further pointed out that no damage can occur to theoperating parts by. reason of fai ure to stop the motor when either ofthe bells has been moved to its closed position because the geardisengages the drum, being moved to close a bell, upon the drum reachingneutral position. I

As many changes could be made in the above construction and manyapparently widely different embodiments of this invention could be madewithout departing from the scope thereof,it is intendedv that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense. i

What is claimed is:

v 1. Ina furnace charging mechanism hav ing a small bell and a largebell, actuating mechanism for the bells, said actuating mech-. anismcomprising; a rotary member operably connected to the small bell, saidrotary member upon rotating from a neutral position causing the smallbell to open; a second ro-' tary member, the axis of said second rotarymember being coincident with the axis of said first rotary member,operably connected to the large bell, said second rotary member uponrotating from a neutral. position causing the large bell to open a motormeans for causing operationof said vinotor in one direction for .vcausing only that'member to rotate fromits 'motorin onedirection; andmeans for causmg connection between said motor and said rotary membersto be effected omy with reconnection between said motorand said rotarymembers to be eifectedonly with respect to said first mentioned rotarymember upon neutral position by said operation of said spect to saidsecond mentioned rotary member upon operation of said motor in the otherdirection for causing only that member to rotate from its neutralposition. by'said opera with the axis of said i'irst rotary member,

operably connected to the large bell, said secv 0nd rotary member uponrotating in the opposite direction from a neutral position causing thelarge bell to open; a motor; means for causing connection between saidmotor and 3,- id rotary members to be effected only with respect to saicfirst rotary member for causing said member to rotate in said onedirection from its-neutralposition without causing r tation of saidsecond rotary member; and ineansfo-r causing connection betwee saidmotor and said rotary members to be e'fiected only with respect to saidsecond rotary memher for causing said member to rotate in said oppositedirection frcm'its neutral position without causing rotation of saidfirst rotary member. I v v 3. In a furnace charging mechanism having asmall bell and a large bell, actuating "mechanism for said bells, saidactuating mechanism comprising; a rotary member operably connected tothe small bell, sald rotary member being in a neutral position when thesmall bell is closed; a second rotary member operably connected to thelarge bell, said second rotarymember being in a neutral position whenthe largebell is closed; a motor; clutch members interposed between saidmotor and said first rotary member and engaging, upon operation of saidmotor in one direction, to connect that member to said motor to berotated thereby from its neutral position to open the small bell; andadditional clutch members interposed between said motor and said secondrotary member and engaging, upon operation of said motor in the oppositedirectiomto connect that member to said motor to be rotated thereby fromits neutral position to open the large bell.

d. In a furnace charging mechanism having a bell, actuating mechanismfor the bell,

escapee said actuating mechanism comprising a: retary member';foruelfecting operation of the bell, said rotarymembersbeingima' neutralpositionlwhen the-bell is closed ;.fleXible t-rans- 1 mission meansoper'ably: connecting saida-ro tary member and the bell, said flexibletransmission means being secured to said rotary member and extendingradially =theI-efrom when .said rotarylmember isin neutral position; andmeans forrotating said rotary. member'f'romits-neutral position toeffect; the

openingof the bell, said flexible transmission means beingshi-fted fromits radialposition upon such rotation of said rotary member,

and assummg a tangential: p0s1t1on w1th're-,

spect to said rotary-member whensaid memmember.

- 5. In a: furnace-charging mechamsm havmg a sm'allhbell and a largebell,-actuat1ng mechanism for-the bells,'said actuatingmechanismcomprising; lever supporting-the small bell; a Weight acting uponthelever for biasing the small bell to closed position a, leversupporting the-large bell a weight, acting upon the leverjfor-biasingthelarge-bell to closed position; a motor meansfor operably connecting'themotor to the firstmen-.

tioned' lever for causing the leverto move the small bell to openposition against the force of the small bell weight by operation of saidmotor in one-direction; and means for operably connecting thefmotor tothesecond mentioned lever for causing the lever to move the large bellto open position against the force of the large bell Weight by operationof said motor in the opposite direction.

6. A furnace charging mechanism, having a small bell and a largebelLactuating mechanism for the bells, said actuating mechanismcomprising; a lever supporting the small bell; a Weight acting uponv theleverfor' biasing the small bell to closed'position; a second leversupporting the large bell; a Weight acting upon the lever for'biasingthe large bell to closedposition; a motor; means for opertioned lever,when the motor operates in one direction from a given position, forcausing the lever to move the small bell to open posi-' the motor isreversed; and means for operably connecting the motor to the secondlever,

-' ber has rotated approximately degrees and thereafter being ,woundupon said rotary ably connecting the motor; to the first menwhenthemotor operates in the other direction from said given position, forcausing'the' sec- 7 0nd lever tomove the large bell to open positionagainst the force of the large-bell weight,

and for thereafter. allowing the large bell to close under the influenceof said the motor is reversec V p 7. furnace charging mechanism having asmall bell and a large bell, actuating mechweight when lil tion causingthe small bell to open; a rotary member loosely mounted upon the shaftand operably connected to the large bell, the rotary member upon beingrotated from a neutral position causing the large bell to open; a

motor; means for operably connecting the motor to the firstmentionedrotary member for causing said member to rotate to open thesmall bell against the force of its biasing means, when the motor isenergized to rotate in one direction, the motor being deenergized whenthe bell is fully opened; means for operably connecting the'motor to thesecond mentioned rotary member for causing said member to rotate to openthe large bell against the force of its biasing means, when the motor isenergized to rotate in the other direction, the motor being deenergizedwhen the bell is fully opened; and means cooperating with either rotarymember for causing that member to hold its bell inopen position againstthe closing biasing means, when that member has moved its bell to openposition and the motor has been deenergized.

8. In a furnace charging mechanism having a small bell and a large bell,actuating mechanism 'for the bells, said actuating mechanism comprising;means biasing the small bell to its closed position; means biasing thelarge bell to its closed position; a shaft; a rotary member looselymounted upon the shaft and operably connected to the small bell, therotary memberupon rotating from its neutral position causing the bell toopen against the force of the biasing means; a second rotary memberloosely mounted upon the shaft and operably connected to the large bell,said second rotary member uponv rotating from its neutral positioncausing the large bell to open against the force of the biasing means; arotary driving member keyed to the shaft; means for connecting thedriving member to the first mentioned'rotary member as the drivingmember is rotated in one direction for causing thefirst mentioned rotarymember to rotate from its neutral position; means for connecting thedriving member to the second mentioned rotary member as the'drivingmember is rotated in the other direction forcausing the second men'-tioned member to rotate from its neutral position; and means for causingthe rotary driving member to rotate in one direction or the other asdesired.

9. In a furnace charging mechanism having a small bell and a large bell,actuating mechanism for the bells, said actuating mechanism comprising;a lever supporting the small bell ;'a weight acting upon the leverforbiasing the small bell to closed position; a lever supporting thelargebell; a weight acting upon the lever-forbiasing the large bell toclosed position; a shaft a rotary member loosely mounted upon the shaft;flexible means operably connecting said rotary memberand the small belllever, said rotary mem ber upon rotating from its neutral'positioncausingthe small bell to openagainst theforc'e; of its biasing weight; asecond rotary member loosely mounted upon the shaft; flexiblemeansoperably connecting the second mentionedrotary member ,to the largebell lever, said second rotary member upon rotating from its neutralposition causing the largebell to open against the. fo'rceof itsbiasingweight; a rotary driving member keyed to.

the shaft; meansfor connecting thedriving member to the first mentionedrotaryvmemher, when the'drivin 'member is rotated in 7 one direction,for causin the first mentioned rotary member to rotate from its neutralposition; means for connecting said driving member to said second rotarymember, when said driving member is rotated in theothen direction, forcausing. said second rotary" member to rotate from/its neutralposition;- and, a motor for rotating said driving member in onedirection or the other as desired.v

10. In a furnace charging mechanism hav-v ing' a: small bell and a largebell, actuating mechanism comprising; means for biasing the small bellto its closed position; means for biasing the large bellto itjsclosedposition; a shaft; a-pair of drums looselymjounted, upon'the shaft, onedrum for each bell; an abutment mounted upon each drum; a flexibletransmission means for the small bell, one end of the flexibletransmission means being connected to the smallbell, the other end ofthe flexible transmission means being connected to the small bell drum;a second flexible transmission means for the large bell, one end of thetransmision means being connected to the large bell, the other end ofthe transmissionmeans being connected to the large bell drum; a rotarydriving member keyed to the shaft; a lug mounted upon the driving memberfor engaging the abutment upon the small bell drum when thedrivmechanism :for the' bells, said actuating? ing member is rotated inone direction from drum when the driving member is rotated in the otherdirection from a neutral position, thereby causing the drum to rotatefor drawing the connected transmission means to open teh large bell; andan electric motor for rotating the driving member in one direction 1 orthe other as desired.

11'. Ina iurnace charging mechanism-havingifa' csmall bell and alargebell, actuating mechanism for" the bells, said actuating mechanism.-comprising; means for biasing the small bell when loaded to closingposition; means for V biasing the large bell When loaded to fully closedposition; 'a V shaft; a pair of drums 'r' loosely mounted uponthe'shaft,jone 'drum for each bell, each of the drums'beingiprovidcdwithaniabutment, the abutments being locatedat' equalviradialdistancesnfrom' the shaft axis; a-hoisting cable for the small bell, oneend of the small bell cable being connected-to the 15rsmall- 'bell, theother end'of' the: small bell ca'ble beingconnected to the periphery ofthe small bell drum; a' hoisting cable" for the large be11,- one end?-of the large? hell 2 cable being connected to the-*large bellf'the otherend of the'large bell cable 'being"connectedto the I periphery ofthelarge bell drum; a driving gear keyed to theshaft; a- 'lug mounted uponone side of the driving gear, adj acent' the small bell 25, drum; saidlug engaging said small bell drum abutment for rotating said small belldrum' Whenthe driving gear is rotated in one direction', thereby"drawing the small bell cable to open the small bell; a se'cond' lumounted f upon'th'e other'side'of the driving gear ad-' jacent the largebell drunfl said; 1 second lug 'engaging said large ybell drumabutmentfor rotating said largebell drum when thedriv ingfge'ar isrotated" in the opposite" direction;

1 thereby-dr wing: thefla'rge bel-l' cable to open I the large' men;andanelectric motor geared to'the driving' gear fo'r rotatingthe drivinggear $in *one direction ortlie other *as desired-f V In testimony iwhereof, I Y havesigned myi' 1 ARTHUR

